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September 1983

Revised May 2005

MM74HC373 3-STATE Octal D-Type Latch

MM74HC373

3-STATE Oct al D-Type Latch

General Descript ion

The MM74HC373 high speed octal D-type latches utilize

advanced silicon-gate CMOS technology. They possess

the high noise immunity and low power consumption of

standard CMOS integrat ed cir cuits, as w ell a s the a bility to

drive 15 LS -TTL loa ds. Du e to the larg e outpu t drive capa-

bility and the 3-STATE feature, these devices are ideally

suited for interfacing with bus lines in a bus organized sys-

tem.

When the LATCH ENABLE input is HIGH, the Q outputs

will follow the D inputs. When the LATCH ENABLE goes

LOW, data at the D inputs will be retained at the outputs

until LATCH ENABLE returns HIGH again. When a high

logic level is applied to the OUTPUT CONTROL input, all

outputs go to a high impedance state, regardless of what

signals are present at th e other inputs and the state of the

storage elements.

The 74H C log i c fam ily i s sp ee d, fu ncti o n, a nd pin- ou t com -

patible with the standard 74LS logic family. All inputs are

protect ed from damage due to static di scharge by in ternal

diode clamps to VCC and ground.

Features

■Typical propagation delay: 18 ns

■Wide operat i ng voltage ran ge : 2 to 6 volts

■Low input current: 1

A maximum

■Low quiescent current: 80

A maximum (74 Series)

■Output drive capability: 15 LS-TTL loads

Ordering Code:

Devices also available in Tape and R eel. Sp ec if y by appending the suffix lett er “X” to the orde ring code.

Connection Diagram

Pin Assignments for DIP, SOIC, SOP and TSSO P

Top View

Truth Table

HIGH Level

LOW Le vel

Level of output befo re s t eady-state input conditions were es tab lis hed.

High Impedance

Order Number Package Number Package Description

MM74HC373WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

MM74HC373SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

MM74HC373MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

MM74HC373N N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

Output Latch Data 373

Control Enable Output

LHHH

LHLL

LLXQ

HXXZ

www.fairchildsemi.com 2

MM74HC373

Absolute Maximum Ratings(No t e 1)

(Note 2) Recommended Operating

Conditions

Note 1: Absolute Maximum Ratings a re those va lues beyon d which d am-

age to the device may occur.

Note 2: Unless ot herwise sp ec ified all vo ltages ar e referenc ed to ground.

Note 3: Power Dis sipation temp erature de rating — plastic “N” package:



12 mW/

C from 65

C to 85

DC Electrical Characteristics

Note 4: For a power supply of 5V

10% t he wor st case ou tput vo ltages (V OH, and VOL) occur for HC a t 4.5V. T hus the 4.5V v alues sho uld be used wh en

designing with this sup ply. Worst case VIH and VIL occur at VCC

5.5V a nd 4.5V respectivel y. (The VIH value at 5. 5V is 3.85V.) The w orst case leakage c ur-

rent (IIN, I CC, and IOZ) occ ur for CMOS at th e higher voltage and so the 6.0 V v alues should be used.

Supply Voltage (VCC)



0.5 to



7.0V

DC Input Voltage (VIN)



1.5 to VCC



1.5V

DC Output Voltage (VOUT)



0.5 to VCC



0.5V

Clamp Diode Current (IIK, IOK)

20 mA

DC Output Current, per pin (IOUT)

35 mA

DC VCC or GND Current, per pin (ICC)

70 mA

Storage Temper ature Range ( T STG)



C to



150

Power Dissipation (PD)

(Note 3) 600 mW

S.O. Package only 500 mW

Lead Temperature (TL)

(Soldering 10 seco nds) 260

Min Max Units

Supply Voltage (VCC)26V

DC Input or Output V oltage

(VIN,VOUT)0V

CC V

Operating Temperature Range (TA)





Input Rise or Fall Times

(tr, tf) V

2.0V 1000 ns

VCC

4.5V 500 ns

VCC

6.0V 400 ns

Symbol Parameter Conditions VCC TA



40 to 85



55 to 125

CUnits

Typ Guaranteed Limits

VIH Minimum HIGH Level 2.0V 1.5 1.5 1.5 V

Input Vo ltage 4.5V 3.15 3.15 3.15 V

6.0V 4.2 4.2 4.2 V

VIL Maximum LOW Level 2.0V 0.5 0.5 0.5 V

Input Voltage 4.5V 1.35 1.35 1.35 V

6.0V 1.8 1.8 1.8 V

VOH Minimum HIGH Level VIN

VIH or VIL

Output Voltage |IOUT|

A 2.0V 2.0 1.9 1.9 1.9 V

4.5V 4.5 4.4 4.4 4.4 V

6.0V 6.0 5.9 5.9 5.9 V

VIN

VIH or VIL

|IOUT|

6.0 mA 4.5V 4.2 3.98 3.84 3.7 V

|IOUT|

7.8 mA 6.0V 5.7 5.48 5.34 5.2 V

VOL Maximum LOW Level VIN

VIH or VIL

Output Voltage |IOUT|

A 2.0V 0 0.1 0.1 0.1 V

4.5V 0 0.1 0.1 0.1 V

6.0V 0 0.1 0.1 0.1 V

VIN

VIH or VIL

|IOUT|

6.0 mA 4.5V 0.2 0.26 0.33 0.4 V

|IOUT|

7.8 mA 6.0V 0.2 0.26 0.33 0.4 V

IIN Maxim um Input VIN

VCC or GND 6.0V

0.1

1.0

Current

IOZ Maxim um 3-STATE VIN

VIH or VIL, OC

VIH 6.0V

0.5

Output Leakage VOUT

VCC or GND

Current

ICC Maximum Quiescent VIN

VCC or GND 6.0V 8.0 80 160

Supply Current IOUT

3 www.fairchildsemi.com

MM74HC373

AC Electrical Characteristics

VCC

5V, TA

C, tr

6 ns

AC Electrical Characteristics

VCC

2.0



6.0V, CL

50 pF, tr

6 ns (unless otherwise specified)

Symbol Parameter Conditions Typ Guaranteed Units

Limit

tPHL, tPLH Maximum Propagation Delay, Data to Q CL

45 pF 18 25 ns

tPHL, tPLH Maximum Propagation Delay, LE to Q CL

45 pF 21 30 ns

tPZH, tPZL Maximum Output Enable Time RL

1 k

20 28 ns

45 pF

tPHZ, tPLZ Maximum Output Disable Time RL

1 k

18 25 ns

5 pF

tSMinimum Set Up Time 5ns

tHMinimum Hold Time 10 ns

tWMinimum Pulse Width 9 16 ns

Symbol Parameter Conditions VCC TA



40 to 85



55 to 125

CUnits

Typ Guaranteed Limits

tPHL, tPLH Maximum Propagation CL

50 pF 2.0V 50 150 188 225 ns

Delay, Data to Q CL

150 pF 2.0V 80 200 250 300 ns

50 pF 4.5V 22 30 37 45 ns

150 pF 4.5V 30 40 50 60 ns

50 pF 6.0V 19 26 31 39 ns

150 pF 6.0V 26 35 44 53 ns

tPHL, tPLH Maximum Propagation CL

50 pF 2.0V 63 175 220 263 ns

Delay, LE to Q CL

150 pF 2.0V 110 225 280 338 ns

50 pF 4.5V 25 35 44 52 ns

150 pF 4.5V 35 45 56 68 ns

50 pF 6.0V 21 30 37 45 ns

150 pF 6.0V 28 39 49 59 ns

tPZH, tPZL Maximum Output RL

1 k

Enable Time CL

50 pF 2.0V 50 150 188 225 ns

150 pF 2.0V 80 200 250 300 ns

50 pF 4.5V 21 30 37 45 ns

150 pF 4.5V 30 40 50 60 ns

50 pF 6.0V 19 26 31 39 ns

150 pF 6.0V 26 35 44 53 ns

tPHZ, tPLZ Maximum Output Disable RL

1 k

2.0V 50 150 188 225 ns

Disable Time CL

50 pF 4.5V 21 30 37 45 ns

6.0V 19 26 31 39 ns

tSMinimum Set Up Time 2.0V 50 60 75 ns

4.5V 9 13 15 ns

6.0V 9 11 13 ns

tHMinimum Hold Time 2.0V 5 5 5 ns

4.5V 5 5 5 ns

6.0V 5 5 5 ns

tWMinimum Pulse Width 2.0V 30 80 100 120 ns

4.5V 10 16 20 24 ns

6.0V 9 14 18 20 ns

tTHL, tTLH Maximum Output Rise CL

50 pF 2.0V 25 60 75 90 ns

and Fall Time 4.5V 7 12 15 18 ns

6.0V 6 10 13 15 ns

CPD Power Dissipation (per latch)

Capacitance (Note 5) OC

VCC 30 pF

GND 50 pF

CIN Maximum Input Capacitance 5 10 10 10 pF

www.fairchildsemi.com 4

MM74HC373

AC Electrical Characteristics (Continued)

Note 5: CPD determines t he no load dy namic powe r c onsumption, PD

CPD VCC2 f



ICC VCC, and the no load dynamic current consumption,

CPD VCC f



ICC.

Symbol Parameter Conditions VCC TA



40 to 85



55 to 125

CUnits

Typ Guarant eed Lim its

COUT Maximum Output 15 20 20 20 pF

Capacitance

5 www.fairchildsemi.com

MM74HC373

Physical Dim ensions inches (millimeters) unless otherwise noted

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

Package Number M20B

www.fairchildsemi.com 6

MM74HC373

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

20-Lead Small Outline Package (SOP ), EIAJ TYPE II, 5.3mm W ide

Package Number M20D

7 www.fairchildsemi.com

MM74HC373

Physical Dim ensions inches (millimeters) unless otherwise noted (Continued)

20-Lea d Th in S hri nk Sm all Ou tlin e Pack age (TSSOP), JED EC MO-1 53, 4.4mm Wide

Package Number MTC20

www.fairchildsemi.com 8

MM74HC373 3-STATE Octal D-Type Latch

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

Package Number N20A

Fairchild does no t assume any responsibility for use of any circui try described, no circuit patent licenses are implied and

Fairchild reserves the right at any time without notice to change said circuitry and specifications.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD

SEMICONDUCTOR CORPORATION. As used herein:

1. Life suppor t de vices o r systems a re devices or syste ms

which, (a) are intended for surgical implant into the

body, or (b) support or sustain life, and (c) whose failure

to perform when properly used in accordance with

instructions for use provided in the labeling, can be rea-

sonably expected to result in a significant injury to the

user.

2. A critical compon ent in any componen t of a life support

device or system whose failure to perform can be rea-

sonabl y ex pect ed to cause the fa ilu re of the lif e su pp ort

device or system, or to affect it s safety or effectiveness.

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www.onsemi.com

ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.

ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent

coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.

ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,

regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or

specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer

application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not

designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification

in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized

application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and

expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such

claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This

literature is subject to all applicable copyright laws and is not for resale in any manner.

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